Partecosta bozzettii Malcolm & Terryn, 2019

Fedosov, Alexander E, Malcolm, Gavin, Terryn, Yves, Gorson, Juliette, Modica, Maria Vittoria, Holford, Mandë & Puillandre, Nicolas, 2019, Phylogenetic classification of the family Terebridae (Neogastropoda: Conoidea), Journal of Molluscan Studies The Malacological Society of London 85 (4), pp. 359-388 : 24

Partecosta bozzettii Malcolm & Terryn new species

( Figs 3K , 11E )

Type material: Holotype: MNHN IM- 2009-10163, lv, 12.5 mm; Port d’Ehoala, SMadagascar, 25 ° 03 ' 43.9 ''S, 46 ° 57 ' 42.9 ''E, 3–4 m (ATIMO VATAE Stn TP29). Paratype 1: MNHN IM-2009- 10162 , lv, 11.8 mm; type locality.

Zoobank registration: urn:lsid:zoobank.org:act:6E3E67B5-1B55-4A99-8D39-6517DA4D065C

Diagnostic nucleotide positions: Table 11 .

Description: Shell small. Protoconch paucispiral, 1 whorl, with broad nucleus. Holotype 9 teleoconch whorls; outline of whorls weakly convex. No subsutural band, or demarcation thereof, except for minor indentation of ribs; no visiblespiral sculpture. Axial sculpture of almost straight, thin ribs, 14 on penultimate whorl, stretching across whorl height; interspaces wider than ribs. Last whorl elongate, tapering towards base. Columella straight, aperture elongate. Shell colour off-white with darker-tinged spiral band adapically on whorls and below periphery; brownish blotches between the axial ribs abapically on whorls; inner columella dark brown or purplish.

Habitat: In sand at 3– 4 m.

Distribution: Known only from type locality.

Etymology: The species honours Luigi Bozzetti (Italy), who has contributed tremendously to the knowledge of the molluscan fauna of SMadagascar.

Remarks: The species resembles P. trilineata ( Fig. 11F ), but differs by its more globose and convex whorls and by having a single row of brown blotches instead of two. In addition, the protoconch of P. trilineata is differently shaped, having two whorls and a medium nucleus. The phylogenetic analysis of Modica et al. (2019) shows significant genetic distance between the two species. Partecosta bozzettii n. sp. shows some resemblance to P. albofuscata , but again differs by its more convex whorls, distinct axial ribbing and shell colour pattern. Partecosta bozzettii n. sp. is similar in general morphology and shell colour pattern to Hastula daniae ( Fig. 2G ) from West Africa, but the latter has a multispiral protoconch and more globose mature whorls.

Figures

Figure 2. Subfamily Pellifroniinae. A–C. Pellifronia jungi. A. MNHN-IM-2013-52275, NANHAI 2014 Stn DW4102, 15◦03'N, 116◦31'E, 339–533 m, 25.5 mm. B. MNHN-IM-2013-52249, EXBODI Stn CP3831, 22◦02'S, 167◦09'E, 523–560 m, 24 mm. C. MNHN-IM-2007-30591, SALOMON 2 Stn CP2195, 08◦26'S, 159◦26'E, 543–593 m, 29 mm (broken), D. Pellifronia brianhayesi holotype, MNHN-IM-2000-20800, S Mozambique, 22.6 mm. E–G. Bathyterebra benthalis. E. MNHN-IM-2013-60185, KARUBENTHOS 2015 Stn CP4524, 16◦29'N, 61◦42'W, 500–550 m, 35.5 mm. F, G. MNHN-IM- 2013-61124, KARUBENTHOS 2015 Stn DW4608, 9.3 mm. H. Bathyterebra zhongshaensis n. sp. holotype, MNHN-IM-2013-61800, ZhongSha 2015 Stn DW4138, 19◦13'N, 113◦56'E, 470–494 m, 17 mm. I. Bathyterebra coriolisi, MNHN-IM-2013-52331, CONCALIS Stn DW3001 18◦32'S, 163◦09'E, 390–400 m, 12.4 mm.

Figure 3. Subfamily Pervicaciinae A. Duplicaria duplicata, MNHN-IM-2009-29454, WESTERN AUSTRALIA 2011 Stn WB32, 33◦33'S, 115◦04'E, 5–15 m, 26.7 mm. B. Duplicaria tricincta, MNHN-IM-2013-5638, PAPUA NIUGINI Stn PD67, 05◦15.5'S, 145◦46.8'E, 2–6 m, 6.9 mm. C. Duplicaria tristis lectotype, NHMUK 1979115, ‘Seas of Japan’, 17.7 mm. D. Duplicaria brevicula, MNHN-IM-2013-66140, off Namibe, S Angola, 40–60 m, 12.9 mm. E. Duplicaria bernardi radula, MNHN-IM-2009-10908, Australia, 26◦56'607''S; 153◦23'813''E, shell broken. F. Terebra fuscobasis lectotype, NHMUK 1873.7.5.8/1, Persian Gulf, 11.3 mm. G. Terebra nassoides lectotype, NHMUK 1968251/1, Red Sea, 13.5 mm. H. Partecosta varia, MNHN-IM-2013-52342, ATIMO VATAE Stn TM27, 24◦56.4'S, 47◦06.9'E, 0–1 m, 10.4 mm. I. Partecosta sandrinae, MNHN-IM-2013-52359, INHACA 2011 Stn MM7 PL5, 26◦03.7'S, 32◦54.1'E, 0–1 m, 8.8 mm. J. Partecosta n. sp. aff fuscolutea radula, MNHN-IM-2009-10133, ATIMO VATAE Stn BS06, 25◦26.8'S, 44◦54.9'E, 0–27 m, 6.9 mm. K. Partecosta bozzettii n. sp. paratype, MNHN-IM-2009-10162, ATIMO VATAE Stn TP29, 25◦03.7–03.8'S, 46◦57.7'E, 3–4 m, 12.4 mm. L. Partecosta trilineata, MNHN-IM-2009-10164, ATIMO VATAE Stn TP24, 25◦03.7–03.8'S, 46◦57.6–57.7'E, 2–7 m, 8.2 mm. M. Partecosta macleani, MNHN-IM-2009-10115 ATIMO VATAE Stn TP19, 25◦04.4–04.7'S, 46◦55.3–56.3'E, 16–26 m, 8.9 mm. N, O. Partecosta macleani radula, MNHN-IM- 2009-10111, ATIMO VATAE Stn TP19, 25◦04.4–04.7'S, 46◦55.3–56.3'E, 16–26 m, 12 mm.

Figure 11. Duplicaria herberti n. sp., Partecosta bozzettii n. sp. and morphologically similar species. A. D. herberti, holotype, MNHN-IM-2013-52381, INHACA 2011 Stn MR15, 26◦00.0'S, 32◦54.4'E, 0–1 m, 29.7 mm. B. D. herberti, MNHN-IM-2013-52366, INHACA 2011 Stn MM1, 26◦02.3'S, 32◦54.1'E, 0–1 m, 12.4 mm. C. D. herberti (paratype of D. mozambiquensis), NMSA 566, 27 mm. D. D. mozambiquensis, YT, Quelimane Pebane, Mozambique, 35–45 m, 19.6 mm. E. Partecosta bozzettii holotype, MNHN-IM-2009-10163, ATIMO VATAE Stn TP29, 25◦03'43.9''S, 46◦57'42.9''E, 3–4 m, 12.5 mm. F. Partecosta trilineata holotype, MNHN-IM-2000-21473, S Madagascar, Lavanono, 8.85 mm. G. P. daniae holotype, MMM, Farol das Lagostas, Luanda, Angola, 12 mm.